<chemistry> An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry.

Synonyms: methyl orange.

Origin: Prob. Fr. L. Helianthes, or NL. Helianthus, sunflower, in allusion to its colour.

(01 Mar 1998)

Helenor Wilder, Helen Taussig, heliacal < Prev | Next > helianthine, helianthoid, helianthoidea

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